[keycloak-dev] Transaction has been retired

* Implemented a Servlet Filter to do this as we discussed before * Unit tests now use Undertow. See new class AbstractKeycloakServerTest * All sub resources need to be initialized using a ResourceContext now * @Context inject KeycloakSession and/or KeycloakTransaction as needed. -- Bill Burke JBoss, a division of Red Hat http://bill.burkecentral.com